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How to get the first line of a file in a bash script?
...t in a bash variable the first line of a file. I guess it is with the grep command, but it is any way to restrict the number of lines?
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Is there a generator version of `string.split()` in Python?
string.split() returns a list instance. Is there a version that returns a generator instead? Are there any reasons against having a generator version?
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__lt__ instead of __cmp__
Python 2.x has two ways to overload comparison operators, __cmp__ or the "rich comparison operators" such as __lt__ . The rich comparison overloads are said to be preferred, but why is this so?
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MySQL JOIN the most recent row only?
I have a table customer that stores a customer_id, email and reference. There is an additional table customer_data that stores a historical record of the changes made to the customer, i.e. when there's a change made a new row is inserted.
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VC菜单命令详解(文件打开、保存与关闭) - C/C++ - 清泛网 - 专注C/C++及内核技术
VC菜单命令详解(文件打开、保存与关闭)第一部分：五个命令ID： 处理函数ID_FILE_NEW CWinApp::OnFileNewID_FILE_OPEN CWinApp::OnFileOpenID_FILE_SAVE CDocument::OnFileSav...第一部分：
五个命令ID： 处理函数
ID_FILE_NEW CWinApp::OnFileNew
ID_FILE_OPEN C...
Django filter queryset __in for *every* item in list
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术
VC窗口刷新InvalidateRect和UpdateWindowWM_PAINT这个重要的消息： The WM_PAINT message is generated by the system and should not be sent by an applicatio...WM_PAINT这个重要的消息：
The WM_PAINT message is generated by the system and should not be sent by an application.The sy...
phpunit mock method multiple calls with different arguments
Is there any way to define different mock-expects for different input arguments? For example, I have database layer class called DB. This class has method called "Query ( string $query )", that method takes an SQL query string on input. Can I create mock for this class (DB) and set different return ...
How to group dataframe rows into list in pandas groupby?
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In Python, how do I index a list with another list?
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